The direction on "Challenge Pusuits" - I'm thinking Mountain biking - says that if authorised by the CO it attracts "On Duty" status. At the same time the direction says that Insurance cover is required.....

....."Once authorised by the CO, these activities attract âOn Dutyâ status. The CO should ensure that a risk assessment has been made, that competent/qualified instructors/leaders/teachers are used to conduct such activities and the relevant insurance cover is provided"

What is "Relevant Insurance" in this context - I've asked "the system" but no-one seems to have a clear idea. Anyone got an authorative reference ?